Michael J. Fox says he's suffered numerous injuries as a result of his Parkinson's

Michael J. Fox has suffered from a number of injuries as a result of his Parkinson's disease, which he was diagnosed with in 1991 at age 29, the actor revealed in an interview with Variety this week.

The 61-year-old "Back to the Future" star opened up about his battle with the disease, explaining the injuries he has gotten from losing his balance. 

The neurological disorder causes unintended stiffness, shakiness and difficulty with coordination, and worsens over time, according to the National Institutes of Health.